Machine for rethreshing the tailings in threshers.



No. 688,823. Patented Dec. I7, 1901.. l M.`S. BOWERS. AMACHINE FDRRETHHESHING TH-E TAILINGS IN THBESHERS.

(Application filed. Juge 26 1901,)

(No Model.)

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UNTTED STATES Trice.

MARTIN S. BOWERS, OF ZANESVILLE, OHIO.

yMACHINE FOR RETHRESHING THETAILINGS IN THRESHERS.

SPECIFICATION forming part of Letters Patent No. 688,823, dated December17, 1901.

Application filed June 26, 1901. SerialNo. 66,124. (No model.)

To all whom, it 71mg/ conceive:

Be it known that I, MARTIN S. BOWERS, a citizen of the United States,residing at Zanesville, in the county ofMuskingum and State of Ohio,have invented new and useful Improvements in Pneumatic Elevators, ot'which the following is a specification.

This invention relates to improvements in machines for rethreshing thetailings in a thresher, the object being to provide au elevatorin thenature of an attachment to threshing-machines alreadyiu use whereby thetailings may be taken from the terminal conveyer and carried to the shoeor riddle, subjecting the tailings to a second threshing and separation,whereby the seed or grain is saved and the chaff discharged from themachine.

The device consists of a combined threshing-cylinder and concave andsuction-fan and is adapted to be used in connection with any of theordinary forms of threshing-machines and clover-hullers, being designedto take the place of the usual elevator which is employed to take thetailings back to the initial point of operation, where they areresubjected to the action of the threshing-cylinder and succeedingoperative parts of the machine.

With the above general objects in View the invention consists in thenovel construction, combination, and arrangement hereinafter fullydescribed, illustrated, and claimed.

In the accompanying drawings, Figure 1 is a longitudinal section throughthe rear portion of the threshing-machine, indicating by dotted linesthe position and relation of the pneumatic elevator of this invention.Fig. 2 is a side elevation of the pneumatic elevator per se. Fig. 3 is acentral longitudinal section through the same. Fig. 4. is a plan viewthereof.

Similar characters of reference designate corresponding parts in allgures of the drawings.

The elevator contemplated in this invention is designed for applicationto an ordinary threshing-machine, aportion of which is illustrated inFig. 1. 1n said figure, 1 designates the frame of the threshing-machine,2 the separating-pan, 3 the shoe or riddle, 4 the blast-fan, 5 thegrain-conveyer, 6 the tailingsconveyer, and 7 the cha and straw apron.

1n carrying out the present invention I einploy a combined blast-fan andauxiliary thresher, comprising a casing constructed in similar sectionsS and 9 of cylindrical form, closed at ltheir outer sides by the sidewalls 10 and open at their inner sides Where they meet, and formed atthe delivery end of the casing with flanges a, over which the lower endof the elevator-pipe engages and is detachably held. The elevator-pipe10a is made of light metal and is adapted to fit over the flange d andhold the pipe in engagement therewith. The pipe is formed with an elbow13, adapted to be inserted through the casing or frame 1 of thethreshing-machine, as illustrated in Fig. 1, so as to deliver therethreshed tailings upon the shaking screen and riddle, Where both thegrain and chaff will be again subjected to the separating action oftheblastfan and shaking-riddle. The sections 8 and 9 of the casing are alsoprovided with rearwardiy-projectingextensions 14, which together form ahopper 15, adapted to underlie the projecting end of the trough of thetailings-conveyer 6 to receive the tailings. Within the curved bottom ofthe hopper 15 is arranged a threshing cylinder comprising a shaft 1G andfingers or teeth 17 radiating therefrom and by preference made taperingtoward their outer extremities. The teeth or fingers 17 cooperate withother teeth oriingers 18 of the same form, projecting upward and inwardfrom the inner surface of a concaveplate 19,-which fits in an opening 2Oand is detachably secured in the bottom of the hopper by any suitablemeans, as shown in Fig. 3. As shown, clips or angle-irons 2l areconnected to the bottom of the hopper for the purpose of holding theconcave 18 in place.

The two sections 8 and 9 of the casing form a fan-chamber 22, in whichis rotatably mounted a fan comprising a shaft 23, with sets of blades 24projecting radially therefrom and spaced a suitable distance apart toreceive between them leather packings in the form of sheets 25, whichproject beyond the outer edges of the blades 24, so as to travel in.contact with the inner cylindrical surface of the fan-casing. Thebottom' of the fan-casing is provided with an opening 26, which isclosed by means of a concave plate or door 27, held in place by means ofclips 28 or detachably secured in position by any proper fastening.

lThe inner face of the plate 27 is provided with a rasp-like surface 29,comprising tine teeth, over which the leather strips 25 move, therebysubjecting the grain or seed and the hulls thereof to a thoroughthreshing after they have been drawn inward through the hopper 15 andsubjected to the action of the smaller threshing-cylinderin thebottomofthe hopper.

The pneumatic elevator hereinabove described is composed of metalthroughout. The fan, threshing-cylinder, and removable doors or plateswith Which said parts coperate may all be made reversible, therebyenabling the parts to be turned end for end and materially increasingthelife of the attachment. The elevator is adapted to be used inconnection With any of the usual forms of threshing-machines andclover-hullers without necessitating any changes whatever and adapts anordinary threshingmachine to be effectively used as a clover-huller.

It Will be apparent that the device as a Whole is susceptible of changesin the form, proportion, and minor details of construction withoutdeparting from the principle or sacrificin'g any of the advantages ofthe invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. A rethreshing attachment for threshingmachines in the form ofapneumatic elevator ladapted to receive the tailings from the tailingsconveyer and discharge the same upon a riddle, said attachment embodyinga casing provided with a receiving-hopper, a

blast-fan rotatably mounted in the casing, and threshing devicesarranged in the bottom of the hopper in advance of the suction-fan.

2. A rethreshing attachment for threshingmachines in the nature of apneumatic elevator comprising a fan-casing, a rotary suction-fan mountedtherein, a tube leading outward from the fan-casing, a receiving-hopper,threshing devices in the bottom of said hopper in advance of thesuction-fan, and removable doors or plates covering the openings in thebottom of the hopper and'fan-casing and provided With teeth.

3. A rethreshing attachment for threshingmachines, comprising a two-partcasing each section constituting a section of the fan-casing, areceiving-hopper and delivery-tube, removable and reversible doorsclosing openings in the bottom of the fan-casing and hopper and providedwith teeth on their inner surfaces, a rotary thresher mounted in thebottom of the hopper, a rotary blast fan mounted in the fan-casingprovided With radial blades spaced apart, and exible packings betweenthe spaced blades arranged to extend beyond the edges of the blades andtravel in contact with the inner surface of the fan-casing.

In testimony whereof I affix my signature in presence of two Witnesses.

MARTIN S. BOWERS.

Witnesses:

F. S. MoCoRMIcK, FRANK P. HAINEs.

